Bracket eos



T. F. ALLEN.

GAR TRUGK.

N0. 27,608. Patented Man 2'], 1860.

UNITED %IA'IE% PATENT 'I. F. ALLEN, OF DYERSVILLE, IOWA.

BRACKE'I FR RAILRGAD-GAR TRUCKS.

Specification cf Letters Patent N0. 27,608, clated March 27, 1880.

T0 u/ll w7wm izf may concem:

Be it known that I, T. F. ALLEN, 0f Dyersville, in lhe county of Dubuque ancl State 0f Iowa, have invented a new ancl useful In1prove1nent in Suspension-Braokets 0f Illl0Cl-C'l Trucks; and I do hereby cleclare t1at l'ho following is a full, olea1, ancl exaot clesoription ol' the san1e, reference being hacl to the aooompanying clrawings, for1ning a pa1t of this specification, in whioh Fign1o l, is a transverse \'i@W of a rail 1oacl car 1'111Ck having my improvement appliecl to it; the seotion being taken in the line r a2, 0 5 Fig. 2. Fig. 2, is a vertioal longitudinal section of the sa1ne in the line y, y, of Fig. l. Fig. 3, is a sicle elevation of my i1nprovecl suspension bracket detachecl fron1 the t1uck b11t resting in its horizontal bearing lato.

Sin1ilar letters of reference, in each of the several Figures inclioate co11esponding parts The nature of 111 V invontion consists in a suspension bracket which is capablo of changing its bearing point and wl1ich acts loy reason of ohanging its point of bea1ing With a counceracting force againstthe lateral vibrations of the car bocly thus cheoks to a consiclerable eXtent, the preponclerance 0f weight 011 either side of the t1aok-fra1ne ancl proventing 1nuch 0f the injurious efiect which the journal 01" sicle springs usually enoounter when brackets which have fixecl fulora a1'o 11Secl.

T0 enable othe1s, skilled in tl1e a1l, to make ancl us'e my invention, I Will proceecl t0 describe its const1uction ancl operation.

In the drawing, I have shown a C211- t1110k having ils swinging bea1n const1ucted accorcling to 1ny patent clated March 29, 1859, b11t I Wish it to be clistinctly umlersloocl that I clo not li1nit tho 11se 0f 1ny present invention 1'0 this cha1racre1 o1 swing ing bea1n.

A, in the drawing, represents the swinging -bea1n provided with a central bea1ing B, t0

receive the hing holt Which fascans 1.he C211- bocly to the truck This swinging bea1n I suspencl 011 the tr11ck-fra1ne C, in the follow- 111g manne1.

Near each e11cl of the boan1, 011 bofh si les, I provide swinging brackets D, D, these brackets are hingecl at their lower encls t0 fulorurn rocls a, a, which attach 10 the 11111101- sido of the spring supporting plate, as shown.

The uppe1 encls of the brackets extencl up Chr 11gh flaring slots b, Z), c11f in the transverse ti1nbe1s of the t111ck f1amo ancl in the bearing plates c, c, Wl1l0l1 a1e bolte l t0 the t0p 0f saicl timbers. It Will be observecl that the tops (Z, of the b1ackets are enlarged t0 a consiclerable extent anal (hat the andersicle of saicl enlarge1nents have the fo1n1 of a seg1nent 0f a circle. Thus enlarging and c11rving the brackets and having the curvecl portion roll 011 the horizontal bearing plales enables 1ne 10 aoco1nplish the objeot hereto f010 nan1ecl, to wit, having the b1ackets to act With a counteracting fo1ce againstfl1e lateral vibrations of the ca1 body; f01 it Will be seen whenever the car-bocly swings t0 the right the lower encl 0f the brackets Will 100 thrown in the sa1ne clireotion that the oar swings, while oho upper curvecl bearing portions swing to having no fixecl fulcra are 1novecl in a reverse direction and consequently causecl t0 bea1 npon the plates 011 0110 side ab poinls noarer tl1e center of the truck fra1ne ancl on the other sicle at points farther fron1 tho center ancl thus act with a counteracting force sufiicient 10 oheck 01 equalize t0 a oonsiclerable extent the preponderance of weight which usually co1nes upon the journal 01 sicle springs of the truok when fixecl fulcra are e1nployecl. The result is just the sa1no whenever the ca1 swings to the left. Thus it Will be seon that the resistance 01 co-unteracting force in either clirection is always connnensnrate with the force with which the car-body moves 10 the right 01 left, that IS if the dia1neter of Ehe circle Whi0h fonns the bearing of the swinging brackets is equal to the clia1neter 0f the circle clescrihod by the lower encl of the braoket.

As the car-bocly is snspenclecl 011 a swing ing bea1n, and the swinging bea1n is SHS penclecl 011 the b1ackets, any motion laterally, of the car-bocly Will be thrown 11p011 the brackets and as the heacls 01"? the brackets shifttheir bearings as clescribecl, t0 an extent c01n1nensu1ato with the extent 0f the outwarcl 1nove1nent of the lower oncls of the brackets, there is 0f necessity a leverage or resisting action derivecl f10n1 the bea1ing points of the b1ackets, ancl saicl action by co1ning upon Ehe trnok has a positive tenclency to throw the oar-bocly ancl swinging bea1n t0 an opposite osition t0 that in which they are moving and thus it is that the preponderance 0f weight upon the sich springs is equalized.

VVhat I claim as my invention und desire to secure by Letters Patent, is

A suspension bracket D, which is capable of chang1ng 1ts bearmg p01nt and wh1ch acts, by reason 01: chang1ng 1ts po1nt 

